LXR linux/drivers/video/aty/mach64

   1
   2/*
   3 *  ATI Mach64 Hardware Acceleration
   4 */
   5
   6#include <linux/delay.h>
   7#include <linux/fb.h>
   8#include <video/mach64.h>
   9#include "atyfb.h"
  10
  11    /*
  12     *  Generic Mach64 routines
  13     */
  14
  15/* this is for DMA GUI engine! work in progress */
  16typedef struct {
  17        u32 frame_buf_offset;
  18        u32 system_mem_addr;
  19        u32 command;
  20        u32 reserved;
  21} BM_DESCRIPTOR_ENTRY;
  22
  23#define LAST_DESCRIPTOR (1 << 31)
  24#define SYSTEM_TO_FRAME_BUFFER 0
  25
  26static u32 rotation24bpp(u32 dx, u32 direction)
  27{
  28        u32 rotation;
  29        if (direction & DST_X_LEFT_TO_RIGHT) {
  30                rotation = (dx / 4) % 6;
  31        } else {
  32                rotation = ((dx + 2) / 4) % 6;
  33        }
  34
  35        return ((rotation << 8) | DST_24_ROTATION_ENABLE);
  36}
  37
  38void aty_reset_engine(const struct atyfb_par *par)
  39{
  40        /* reset engine */
  41        aty_st_le32(GEN_TEST_CNTL,
  42                aty_ld_le32(GEN_TEST_CNTL, par) &
  43                ~(GUI_ENGINE_ENABLE | HWCURSOR_ENABLE), par);
  44        /* enable engine */
  45        aty_st_le32(GEN_TEST_CNTL,
  46                aty_ld_le32(GEN_TEST_CNTL, par) | GUI_ENGINE_ENABLE, par);
  47        /* ensure engine is not locked up by clearing any FIFO or */
  48        /* HOST errors */
  49        aty_st_le32(BUS_CNTL,
  50                aty_ld_le32(BUS_CNTL, par) | BUS_HOST_ERR_ACK | BUS_FIFO_ERR_ACK, par);
  51}
  52
  53static void reset_GTC_3D_engine(const struct atyfb_par *par)
  54{
  55        aty_st_le32(SCALE_3D_CNTL, 0xc0, par);
  56        mdelay(GTC_3D_RESET_DELAY);
  57        aty_st_le32(SETUP_CNTL, 0x00, par);
  58        mdelay(GTC_3D_RESET_DELAY);
  59        aty_st_le32(SCALE_3D_CNTL, 0x00, par);
  60        mdelay(GTC_3D_RESET_DELAY);
  61}
  62
  63void aty_init_engine(struct atyfb_par *par, struct fb_info *info)
  64{
  65        u32 pitch_value;
  66        u32 vxres;
  67
  68        /* determine modal information from global mode structure */
  69        pitch_value = info->fix.line_length / (info->var.bits_per_pixel / 8);
  70        vxres = info->var.xres_virtual;
  71
  72        if (info->var.bits_per_pixel == 24) {
  73                /* In 24 bpp, the engine is in 8 bpp - this requires that all */
  74                /* horizontal coordinates and widths must be adjusted */
  75                pitch_value *= 3;
  76                vxres *= 3;
  77        }
  78
  79        /* On GTC (RagePro), we need to reset the 3D engine before */
  80        if (M64_HAS(RESET_3D))
  81                reset_GTC_3D_engine(par);
  82
  83        /* Reset engine, enable, and clear any engine errors */
  84        aty_reset_engine(par);
  85        /* Ensure that vga page pointers are set to zero - the upper */
  86        /* page pointers are set to 1 to handle overflows in the */
  87        /* lower page */
  88        aty_st_le32(MEM_VGA_WP_SEL, 0x00010000, par);
  89        aty_st_le32(MEM_VGA_RP_SEL, 0x00010000, par);
  90
  91        /* ---- Setup standard engine context ---- */
  92
  93        /* All GUI registers here are FIFOed - therefore, wait for */
  94        /* the appropriate number of empty FIFO entries */
  95        wait_for_fifo(14, par);
  96
  97        /* enable all registers to be loaded for context loads */
  98        aty_st_le32(CONTEXT_MASK, 0xFFFFFFFF, par);
  99
 100        /* set destination pitch to modal pitch, set offset to zero */
 101        aty_st_le32(DST_OFF_PITCH, (pitch_value / 8) << 22, par);
 102
 103        /* zero these registers (set them to a known state) */
 104        aty_st_le32(DST_Y_X, 0, par);
 105        aty_st_le32(DST_HEIGHT, 0, par);
 106        aty_st_le32(DST_BRES_ERR, 0, par);
 107        aty_st_le32(DST_BRES_INC, 0, par);
 108        aty_st_le32(DST_BRES_DEC, 0, par);
 109
 110        /* set destination drawing attributes */
 111        aty_st_le32(DST_CNTL, DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
 112                    DST_X_LEFT_TO_RIGHT, par);
 113
 114        /* set source pitch to modal pitch, set offset to zero */
 115        aty_st_le32(SRC_OFF_PITCH, (pitch_value / 8) << 22, par);
 116
 117        /* set these registers to a known state */
 118        aty_st_le32(SRC_Y_X, 0, par);
 119        aty_st_le32(SRC_HEIGHT1_WIDTH1, 1, par);
 120        aty_st_le32(SRC_Y_X_START, 0, par);
 121        aty_st_le32(SRC_HEIGHT2_WIDTH2, 1, par);
 122
 123        /* set source pixel retrieving attributes */
 124        aty_st_le32(SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT, par);
 125
 126        /* set host attributes */
 127        wait_for_fifo(13, par);
 128        aty_st_le32(HOST_CNTL, 0, par);
 129
 130        /* set pattern attributes */
 131        aty_st_le32(PAT_REG0, 0, par);
 132        aty_st_le32(PAT_REG1, 0, par);
 133        aty_st_le32(PAT_CNTL, 0, par);
 134
 135        /* set scissors to modal size */
 136        aty_st_le32(SC_LEFT, 0, par);
 137        aty_st_le32(SC_TOP, 0, par);
 138        aty_st_le32(SC_BOTTOM, par->crtc.vyres - 1, par);
 139        aty_st_le32(SC_RIGHT, vxres - 1, par);
 140
 141        /* set background color to minimum value (usually BLACK) */
 142        aty_st_le32(DP_BKGD_CLR, 0, par);
 143
 144        /* set foreground color to maximum value (usually WHITE) */
 145        aty_st_le32(DP_FRGD_CLR, 0xFFFFFFFF, par);
 146
 147        /* set write mask to effect all pixel bits */
 148        aty_st_le32(DP_WRITE_MASK, 0xFFFFFFFF, par);
 149
 150        /* set foreground mix to overpaint and background mix to */
 151        /* no-effect */
 152        aty_st_le32(DP_MIX, FRGD_MIX_S | BKGD_MIX_D, par);
 153
 154        /* set primary source pixel channel to foreground color */
 155        /* register */
 156        aty_st_le32(DP_SRC, FRGD_SRC_FRGD_CLR, par);
 157
 158        /* set compare functionality to false (no-effect on */
 159        /* destination) */
 160        wait_for_fifo(3, par);
 161        aty_st_le32(CLR_CMP_CLR, 0, par);
 162        aty_st_le32(CLR_CMP_MASK, 0xFFFFFFFF, par);
 163        aty_st_le32(CLR_CMP_CNTL, 0, par);
 164
 165        /* set pixel depth */
 166        wait_for_fifo(2, par);
 167        aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
 168        aty_st_le32(DP_CHAIN_MASK, par->crtc.dp_chain_mask, par);
 169
 170        wait_for_fifo(5, par);
 171        aty_st_le32(SCALE_3D_CNTL, 0, par);
 172        aty_st_le32(Z_CNTL, 0, par);
 173        aty_st_le32(CRTC_INT_CNTL, aty_ld_le32(CRTC_INT_CNTL, par) & ~0x20,
 174                    par);
 175        aty_st_le32(GUI_TRAJ_CNTL, 0x100023, par);
 176
 177        /* insure engine is idle before leaving */
 178        wait_for_idle(par);
 179}
 180
 181    /*
 182     *  Accelerated functions
 183     */
 184
 185static inline void draw_rect(s16 x, s16 y, u16 width, u16 height,
 186                             struct atyfb_par *par)
 187{
 188        /* perform rectangle fill */
 189        wait_for_fifo(2, par);
 190        aty_st_le32(DST_Y_X, (x << 16) | y, par);
 191        aty_st_le32(DST_HEIGHT_WIDTH, (width << 16) | height, par);
 192        par->blitter_may_be_busy = 1;
 193}
 194
 195void atyfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 196{
 197        struct atyfb_par *par = (struct atyfb_par *) info->par;
 198        u32 dy = area->dy, sy = area->sy, direction = DST_LAST_PEL;
 199        u32 sx = area->sx, dx = area->dx, width = area->width, rotation = 0;
 200
 201        if (par->asleep)
 202                return;
 203        if (!area->width || !area->height)
 204                return;
 205        if (!par->accel_flags) {
 206                cfb_copyarea(info, area);
 207                return;
 208        }
 209
 210        if (info->var.bits_per_pixel == 24) {
 211                /* In 24 bpp, the engine is in 8 bpp - this requires that all */
 212                /* horizontal coordinates and widths must be adjusted */
 213                sx *= 3;
 214                dx *= 3;
 215                width *= 3;
 216        }
 217
 218        if (area->sy < area->dy) {
 219                dy += area->height - 1;
 220                sy += area->height - 1;
 221        } else
 222                direction |= DST_Y_TOP_TO_BOTTOM;
 223
 224        if (sx < dx) {
 225                dx += width - 1;
 226                sx += width - 1;
 227        } else
 228                direction |= DST_X_LEFT_TO_RIGHT;
 229
 230        if (info->var.bits_per_pixel == 24) {
 231                rotation = rotation24bpp(dx, direction);
 232        }
 233
 234        wait_for_fifo(4, par);
 235        aty_st_le32(DP_SRC, FRGD_SRC_BLIT, par);
 236        aty_st_le32(SRC_Y_X, (sx << 16) | sy, par);
 237        aty_st_le32(SRC_HEIGHT1_WIDTH1, (width << 16) | area->height, par);
 238        aty_st_le32(DST_CNTL, direction | rotation, par);
 239        draw_rect(dx, dy, width, area->height, par);
 240}
 241
 242void atyfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 243{
 244        struct atyfb_par *par = (struct atyfb_par *) info->par;
 245        u32 color = rect->color, dx = rect->dx, width = rect->width, rotation = 0;
 246
 247        if (par->asleep)
 248                return;
 249        if (!rect->width || !rect->height)
 250                return;
 251        if (!par->accel_flags) {
 252                cfb_fillrect(info, rect);
 253                return;
 254        }
 255
 256        color |= (rect->color << 8);
 257        color |= (rect->color << 16);
 258
 259        if (info->var.bits_per_pixel == 24) {
 260                /* In 24 bpp, the engine is in 8 bpp - this requires that all */
 261                /* horizontal coordinates and widths must be adjusted */
 262                dx *= 3;
 263                width *= 3;
 264                rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
 265        }
 266
 267        wait_for_fifo(3, par);
 268        aty_st_le32(DP_FRGD_CLR, color, par);
 269        aty_st_le32(DP_SRC,
 270                    BKGD_SRC_BKGD_CLR | FRGD_SRC_FRGD_CLR | MONO_SRC_ONE,
 271                    par);
 272        aty_st_le32(DST_CNTL,
 273                    DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
 274                    DST_X_LEFT_TO_RIGHT | rotation, par);
 275        draw_rect(dx, rect->dy, width, rect->height, par);
 276}
 277
 278void atyfb_imageblit(struct fb_info *info, const struct fb_image *image)
 279{
 280        struct atyfb_par *par = (struct atyfb_par *) info->par;
 281        u32 src_bytes, dx = image->dx, dy = image->dy, width = image->width;
 282        u32 pix_width_save, pix_width, host_cntl, rotation = 0, src, mix;
 283
 284        if (par->asleep)
 285                return;
 286        if (!image->width || !image->height)
 287                return;
 288        if (!par->accel_flags ||
 289            (image->depth != 1 && info->var.bits_per_pixel != image->depth)) {
 290                cfb_imageblit(info, image);
 291                return;
 292        }
 293
 294        pix_width = pix_width_save = aty_ld_le32(DP_PIX_WIDTH, par);
 295        host_cntl = aty_ld_le32(HOST_CNTL, par) | HOST_BYTE_ALIGN;
 296
 297        switch (image->depth) {
 298        case 1:
 299            pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
 300            pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_1BPP);
 301            break;
 302        case 4:
 303            pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
 304            pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_4BPP);
 305            break;
 306        case 8:
 307            pix_width &= ~HOST_MASK;
 308            pix_width |= HOST_8BPP;
 309            break;
 310        case 15:
 311            pix_width &= ~HOST_MASK;
 312            pix_width |= HOST_15BPP;
 313            break;
 314        case 16:
 315            pix_width &= ~HOST_MASK;
 316            pix_width |= HOST_16BPP;
 317            break;
 318        case 24:
 319            pix_width &= ~HOST_MASK;
 320            pix_width |= HOST_24BPP;
 321            break;
 322        case 32:
 323            pix_width &= ~HOST_MASK;
 324            pix_width |= HOST_32BPP;
 325            break;
 326        }
 327
 328        if (info->var.bits_per_pixel == 24) {
 329                /* In 24 bpp, the engine is in 8 bpp - this requires that all */
 330                /* horizontal coordinates and widths must be adjusted */
 331                dx *= 3;
 332                width *= 3;
 333
 334                rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
 335
 336                pix_width &= ~DST_MASK;
 337                pix_width |= DST_8BPP;
 338
 339                /*
 340                 * since Rage 3D IIc we have DP_HOST_TRIPLE_EN bit
 341                 * this hwaccelerated triple has an issue with not aligned data
 342                 */
 343                if (M64_HAS(HW_TRIPLE) && image->width % 8 == 0)
 344                        pix_width |= DP_HOST_TRIPLE_EN;
 345        }
 346
 347        if (image->depth == 1) {
 348                u32 fg, bg;
 349                if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 350                    info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
 351                        fg = ((u32*)(info->pseudo_palette))[image->fg_color];
 352                        bg = ((u32*)(info->pseudo_palette))[image->bg_color];
 353                } else {
 354                        fg = image->fg_color;
 355                        bg = image->bg_color;
 356                }
 357
 358                wait_for_fifo(2, par);
 359                aty_st_le32(DP_BKGD_CLR, bg, par);
 360                aty_st_le32(DP_FRGD_CLR, fg, par);
 361                src = MONO_SRC_HOST | FRGD_SRC_FRGD_CLR | BKGD_SRC_BKGD_CLR;
 362                mix = FRGD_MIX_S | BKGD_MIX_S;
 363        } else {
 364                src = MONO_SRC_ONE | FRGD_SRC_HOST;
 365                mix = FRGD_MIX_D_XOR_S | BKGD_MIX_D;
 366        }
 367
 368        wait_for_fifo(6, par);
 369        aty_st_le32(DP_WRITE_MASK, 0xFFFFFFFF, par);
 370        aty_st_le32(DP_PIX_WIDTH, pix_width, par);
 371        aty_st_le32(DP_MIX, mix, par);
 372        aty_st_le32(DP_SRC, src, par);
 373        aty_st_le32(HOST_CNTL, host_cntl, par);
 374        aty_st_le32(DST_CNTL, DST_Y_TOP_TO_BOTTOM | DST_X_LEFT_TO_RIGHT | rotation, par);
 375
 376        draw_rect(dx, dy, width, image->height, par);
 377        src_bytes = (((image->width * image->depth) + 7) / 8) * image->height;
 378
 379        /* manual triple each pixel */
 380        if (info->var.bits_per_pixel == 24 && !(pix_width & DP_HOST_TRIPLE_EN)) {
 381                int inbit, outbit, mult24, byte_id_in_dword, width;
 382                u8 *pbitmapin = (u8*)image->data, *pbitmapout;
 383                u32 hostdword;
 384
 385                for (width = image->width, inbit = 7, mult24 = 0; src_bytes; ) {
 386                        for (hostdword = 0, pbitmapout = (u8*)&hostdword, byte_id_in_dword = 0;
 387                                byte_id_in_dword < 4 && src_bytes;
 388                                byte_id_in_dword++, pbitmapout++) {
 389                                for (outbit = 7; outbit >= 0; outbit--) {
 390                                        *pbitmapout |= (((*pbitmapin >> inbit) & 1) << outbit);
 391                                        mult24++;
 392                                        /* next bit */
 393                                        if (mult24 == 3) {
 394                                                mult24 = 0;
 395                                                inbit--;
 396                                                width--;
 397                                        }
 398
 399                                        /* next byte */
 400                                        if (inbit < 0 || width == 0) {
 401                                                src_bytes--;
 402                                                pbitmapin++;
 403                                                inbit = 7;
 404
 405                                                if (width == 0) {
 406                                                    width = image->width;
 407                                                    outbit = 0;
 408                                                }
 409                                        }
 410                                }
 411                        }
 412                        wait_for_fifo(1, par);
 413                        aty_st_le32(HOST_DATA0, hostdword, par);
 414                }
 415        } else {
 416                u32 *pbitmap, dwords = (src_bytes + 3) / 4;
 417                for (pbitmap = (u32*)(image->data); dwords; dwords--, pbitmap++) {
 418                        wait_for_fifo(1, par);
 419                        aty_st_le32(HOST_DATA0, le32_to_cpup(pbitmap), par);
 420                }
 421        }
 422
 423        /* restore pix_width */
 424        wait_for_fifo(1, par);
 425        aty_st_le32(DP_PIX_WIDTH, pix_width_save, par);
 426}
 427